Hold Type Image Display System

1. A hold type image display system for displaying a video on a display panel by controlling a video signal to be input to a source line and a gate line of the display panel, the hold type image display system comprising: a source driver outputting the video signal to the source line; wherein the source driver confirms data signals and positive or negative from a reference voltage according to a polarity inverting control signal and outputs tone voltages to the source line, and the polarity inverting control signal is a logic AND of a first internal signal and a second internal signal; a gate driver outputting a scanning signal to the gate line; and a controller receiving an input video signal and controlling the source driver and the gate driver according to the received input video signal; wherein the controller outputs the video signal in which a black or gray line is inserted between video lines of the video signal to the source driver, outputs a start pulse signal for writing the video lines for one or more times and a start pulse signal for writing black or gray lines for one or more times to the gate driver within one frame period, and independently determines and inverts a write polarity of the video signal and a write polarity of the black or gray signal in each frame cycle; and the controller scrolls a black band in a screen of the display panel during one frame, wherein the controller determines the write polarity of the video signal according to the first internal signal, and determines the write polarity of the black or gray signal according to the second internal signal that is independent from the first internal signal.

2. The hold type image display system according to claim 1 , wherein the controller inverts the write polarity of the video signal with a point of writing the video signal to a first line of the frame as a base point according to the first internal signal, and inverts the write polarity of the black or gray signal with a point of writing the black or gray signal to the first line of the frame as a base point according to the second internal signal.

3. The hold type image display system according to claim 1 , wherein the controller inverses the write polarity of the video signal of a first line driven by a first gate driver and the write polarity of the black or gray signal of a second line driven by a second gate driver within each horizontal scanning period in frame periods of in each frame cycle.

4. The hold type image display system according to claim 3 , wherein each horizontal scanning period comprises a preceding half horizontal scanning period and a following half horizontal scanning period, the first line is driven by the first gate drive in the preceding half horizontal scanning period, and the second line is driven by the second gate driver in the following half horizontal scanning period.

5. The hold type image display system according to claim 1 , wherein the controller changes a timing of input of the start pulse signal to the gate driver to write the black or gray lines with respect to input of the start pulse signal to the gate driver to write the video signal based on black or gray insertion rate information.

6. The hold type image display system according to claim 1 , wherein the controller determines a black or gray insertion rate according to a display, and changes a timing of input of the start pulse signal to the gate driver to write the black or gray lines with respect to input of the start pulse signal to the gate driver to write the video lines based on the determined black or gray insertion rate.

7. The hold type image display system according to claim 1 , wherein each frame period comprises a formal display period and a blanking period existing between preceding and following formal display periods, the controller outputs the video line signals and the black or gray line signals to the source driver in the formal display period and outputs the black or gray line signals to the source driver during the blanking period.

8. The hold type image display system according to claim 1 , wherein the write polarity of the video signal applied to a source line is opposite to the write polarity of the black or gray signal applied to the same source line in each horizontal scanning period.

9. A control system of a hold type image display system for drive displaying a video on a display panel by controlling a video signal to a source line of the display panel in a source driver and controlling a signal to a gate line of the display panel in a gate driver; wherein the source driver confirms data signals and positive or negative from a reference voltage according to a polarity inverting control signal and outputs tone voltages to the source lines, and the polarity inverting control signal is a logic AND of a first internal signal and a second internal signal; the control system comprising: a controller receiving an input video signal and controlling the source driver and the gate driver according to the received input video signal; wherein the controller outputs a video signal in which a black or gray line is inserted between video lines of the output video signal to the source driver, outputs a start pulse signal for writing the video lines for one or more times and a start pulse signal for writing black or gray lines for one or more times to the gate driver within one frame period, and independently determines and inverts a write polarity of the video signal and a write polarity of the black or gray signal in each frame cycle; and the controller scrolls a black band in a screen of the display panel during one frame, wherein the controller inverts the write polarity of the video signal with a point of writing the video signal to a first line of the frame as a base point according to the first internal signal, and inverts the write polarity of the black or gray signal with a point of writing the black or gray signal to the first line of the frame as a base point according to the second internal signal that is independent from the first internal signal.

10. The hold type image display system according to claim 9 , wherein the controller separately inverses the write polarity of the video signal of a first line driven by a first gate driver and the write polarity of the black or gray signal of a second line driven by a second gate driver within each horizontal scanning period in each frame cycle.

11. The control system according to claim 9 , wherein the write polarity of the video signal applied to a source line is opposite to the write polarity of the black or gray signal applied to the same source line in each horizontal scanning period.

12. A hold type image display method for displaying a video on a display panel by controlling a video signal to a source line of a display panel in a source driver and controlling a signal to a gate line of the display panel in a gate driver, the hold type image display method comprising: outputting the video signal in which a black or gray line is inserted between video lines of the video signal to the source driver, wherein the source driver confirms data signals and positive or negative from a reference voltage according to a polarity inverting control signal and outputs tone voltages to the source lines, and the polarity inverting control signal is a logic AND of a first internal signal and a second internal signal; outputting a start pulse signal for writing the video lines for one or more times and a start pulse signal for writing black or gray lines for one or more times to the gate driver within one frame period; scrolling a black band in a screen of the display panel during one frame; and inverting a write polarity of the video signal and a write polarity of the black or gray signal in each frame cycle independently, wherein the write polarity of the video signal is inverted with a point of writing the video signal to a first line of the frame as a base point according to the first internal signal, and the write polarity of the black or gray signal is inverted with a point of writing the black or gray signal to the first line of the frame as a base point according to the second internal signal that is different from the first internal signal.

13. The hold type image display method according to claim 12 , wherein the write polarity of the video signal of a first line driven by a first gate driver and the write polarity of the black or gray signal of a second line driven by a second gate driver are inverted independently within each horizontal scanning period in frame periods of in each frame cycle.

14. The hold type image display method according to claim 12 , wherein a timing of input of the start pulse signal to the gate driver to write the black or gray lines with respect to input of the start pulse signal to the gate driver to write the video lines is changed based on black or gray insertion rate information.

15. The hold type image display method according to claim 12 , wherein a black or gray insertion rate is determined according to a display, and a timing of input of the start pulse signal to the gate driver to write the black or gray lines with respect to input of the start pulse signal to the gate driver to write the video lines is changed based on the determined black or gray insertion rate.

16. The hold type image display method according to claim 12 , wherein each frame period comprises a formal display period and a blanking period existing between preceding and following formal display periods, the video line signals are output to the source driver in the formal display period, and the black or gray line signals are output to the source driver during the blanking period.

17. The hold type image display method according to claim 12 , the preceding and following video signals of one frame unit are compared, and a relationship between a light control luminance of backlight arranged on a rear surface of the display panel and a black or gray insertion rate is adjusted based on the comparison result.

18. The hold type image display method according to claim 12 , wherein the write polarity of the video signal applied to a source line is opposite to the write polarity of the black or gray signal applied to the same source line in each horizontal scanning period.